CN111239974A - Optical camera system group, image capturing device and electronic device - Google Patents

Abstract

The invention discloses an optical camera system group, an imaging device and an electronic device. The optical camera system group includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens in order along the optical axis from the object side to the image side. The first lens has positive refractive power. The object-side surface of the third lens is convex. At least one of the object-side surface and the image-side surface of the fourth lens is aspherical. At least one of the object-side surface and the image-side surface of the fifth lens is aspherical, and at least one of the object-side surface and the image-side surface includes at least one inflection point. When certain conditions are met, it can have both telephoto function and miniaturization characteristics. The invention also discloses an imaging device with the above-mentioned optical camera system group and an electronic device with the above-mentioned imaging device.

Description

Optical camera system group, imaging device and electronic device

This application is a divisional application of a patent application with an application date of August 5, 2016, an application number of 201610636068.8, and an invention title of "optical camera system group, imaging device and electronic device".

technical field

The present invention relates to an optical camera system group and an imaging device, and more particularly, to a miniaturized optical camera system group and an imaging device with telephoto function applied to an electronic device.

Background technique

With the diversification of the application of camera modules, the market has stricter requirements for miniaturization and imaging quality, especially portable device products are closer to the needs of the public. In order to have a wider range of experience, smart devices equipped with one, two, or even three or more lenses have gradually become the mainstream of the market, and the field of view angle of the camera module needs to be changed more.

The traditional telescopic lens is limited by changes in the shape of the mirror surface and the material of the lens, which makes the lens volume difficult to reduce and the unit price is too high, resulting in limited application scope. Therefore, a lens that can take into account the characteristics of telephoto, miniaturization and high imaging quality can meet the specifications and needs of the future market, and can be used in portable devices, miniaturized electronic products, zoom devices, multi-lens devices, etc. The current goal of optical lens industry technology development.

SUMMARY OF THE INVENTION

The optical camera system group, the imaging device and the electronic device provided by the present invention have a telephoto function by providing an appropriate viewing angle range, and effectively control the back focus, so as to reduce the required thickness of the device, and further, can provide Sufficient optical path turning space to enhance the use efficiency of the optical camera system group space.

According to the present invention, an optical camera system group is provided, which includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence along the optical axis from the object side to the image side. The first lens has positive refractive power. The object-side surface of the third lens is convex. At least one of the object-side surface and the image-side surface of the fourth lens is aspherical. At least one of the object-side surface and the image-side surface of the fifth lens is aspherical, and at least one of the object-side surface and the image-side surface includes at least one inflection point. The total number of lenses in the optical camera system group is five, and there is an air gap on the optical axis between any two adjacent lenses in the optical camera system group. The distance between the image side surface of the lens close to the imaging surface and the imaging surface on the optical axis is BL. The distance on the optical axis is TD, the distance between the second lens and the third lens on the optical axis is T23, the thickness of the first lens on the optical axis is CT1, the focal length of the optical camera system group is f, and the fourth lens The focal length is f4, which satisfies the following conditions:

0.10<tan(FOV)<0.85;

0.55<BL/TD<1.80;

0<T23/CT1<0.60; and

-1.0<f/f4<1.0.

According to another aspect of the present invention, an imaging device is provided, comprising the optical camera system group and the electronic photosensitive element as described in the preceding paragraph, wherein the electronic photosensitive element is disposed on the imaging surface of the optical camera system group.

According to the present invention, an electronic device is further provided, including the imaging device as described in the preceding paragraph.

When the tan(FOV) satisfies the above conditions, it is beneficial to capture distant images, so as to improve the resolution of local images, thereby achieving the telephoto effect.

When the BL/TD meets the above conditions, the back focal length of the optical camera system group can be controlled to achieve sufficient focal length in a small space, so as to meet the telephoto characteristics and reduce the thickness of the optical camera system group.

When T23/CT1 satisfies the above conditions, the first lens can be provided with sufficient thickness to adapt to environmental changes and enhance the practicability of the mechanism, and at the same time avoid space waste caused by the excessive distance between the second lens and the third lens.

When f/f4 satisfies the above conditions, the refractive power of the fourth lens can be effectively balanced, so as to achieve a balance between the telephoto structure and the back focal length.

Description of drawings

FIG. 1A is a schematic diagram of an optical camera system set according to a first embodiment of the present invention;

FIG. 1B is a schematic diagram showing the optical camera system set according to the first embodiment of FIG. 1A with another prism with different shapes and arrangements;

FIG. 1C is a schematic diagram illustrating the optical camera system set according to the first embodiment of FIG. 1A with another prism with different shapes and arrangements;

FIG. 2 is a graph of spherical aberration, astigmatism and distortion curves of the first embodiment from left to right;

3A is a schematic diagram of an optical camera system group according to a second embodiment of the present invention;

FIG. 3B is a schematic diagram illustrating the optical camera system set in accordance with the second embodiment of FIG. 3A and another prism with different shapes and arrangements;

FIG. 3C is a schematic diagram of the optical camera system set according to the second embodiment of FIG. 3A with yet another prism with different shapes and arrangements;

FIG. 4A is a graph showing spherical aberration, astigmatism and distortion curves of the optical camera system set of the second embodiment with an infinite object distance (Infinity) from left to right;

FIG. 4B is a graph showing spherical aberration, astigmatism and distortion curves of the optical camera system set of the second embodiment with an object distance of 400 mm from left to right;

5A is a schematic diagram of an optical camera system group according to a third embodiment of the present invention;

FIG. 5B is a schematic diagram illustrating the optical camera system set with prisms of different shapes and arrangements according to the third embodiment of FIG. 5A ;

FIG. 6 is a graph of spherical aberration, astigmatism and distortion of the third embodiment from left to right;

7 is a schematic diagram of an optical camera system group according to a fourth embodiment of the present invention;

FIG. 8 is a graph of spherical aberration, astigmatism and distortion of the fourth embodiment from left to right;

9 is a schematic diagram of an optical camera system group according to a fifth embodiment of the present invention;

FIG. 10 is a graph of spherical aberration, astigmatism and distortion of the fifth embodiment from left to right;

11A is a schematic diagram of an optical camera system group according to a sixth embodiment of the present invention;

FIG. 11B is a schematic diagram showing the optical camera system set according to the sixth embodiment of FIG. 11A with another prism with different shapes and arrangements;

FIG. 11C is a schematic diagram of the optical camera system set according to the sixth embodiment of FIG. 11A collocated with another prism with different shapes and arrangements;

FIG. 12 is a graph of spherical aberration, astigmatism and distortion of the sixth embodiment from left to right;

13A is a schematic diagram of an optical camera system group according to a seventh embodiment of the present invention;

FIG. 13B is a schematic diagram illustrating the optical camera system set according to the seventh embodiment of FIG. 13A with another prism with different shapes and arrangements;

FIG. 13C is a schematic diagram of the optical camera system set in accordance with the seventh embodiment of FIG. 13A and another prism with different shapes and arrangements;

FIG. 14A is a graph showing spherical aberration, astigmatism, and distortion curves of the seventh embodiment of an optical camera system set with an infinite object distance (Infinity) from left to right;

14B is a graph showing spherical aberration, astigmatism and distortion curves of the seventh embodiment of the optical camera system set with an object distance of 400 mm from left to right;

15 is a schematic diagram of an electronic device according to an eighth embodiment of the present invention;

16 is a schematic diagram of an electronic device according to a ninth embodiment of the present invention;

17 is a schematic diagram of an electronic device according to a tenth embodiment of the present invention;

18 is a schematic diagram of an electronic device according to an eleventh embodiment of the present invention;

FIG. 19 is a schematic diagram illustrating parameters in the optical camera system group of the first embodiment; and

FIG. 20 is a schematic diagram of the parameter TP in the optical camera system group according to the first embodiment.

【Symbol Description】

Electronic device: 1000, 2000, 3000, 4000

Image acquisition device: 1100, 2100, 3100, 4100

Electronic photosensitive element: 1110

Aperture: 100, 200, 300, 400, 500, 600, 700

The first lens: 110, 210, 310, 410, 510, 610, 710

Object side surface: 111, 211, 311, 411, 511, 611, 711

Image side surface: 112, 212, 312, 412, 512, 612, 712

Second lens: 120, 220, 320, 420, 520, 620, 720

Object side surface: 121, 221, 321, 421, 521, 621, 721

Image side surface: 122, 222, 322, 422, 522, 622, 722

Third lens: 130, 230, 330, 430, 530, 630, 730

Object side surface: 131, 231, 331, 431, 531, 631, 731

Image side surface: 132, 232, 332, 432, 532, 632, 732

Fourth lens: 140, 240, 340, 440, 540, 640, 740

Object side surface: 141, 241, 341, 441, 541, 641, 741

Image side surface: 142, 242, 342, 442, 542, 642, 742

Fifth lens: 150, 250, 350, 450, 550, 650, 750

Object side surface: 151, 251, 351, 451, 551, 651, 751

Image side surface: 152, 252, 352, 452, 552, 652, 752

Filter elements: 160, 260, 360, 460, 560, 660, 760

Imaging surface: 170, 270, 370, 470, 570, 670, 770

Prism: 180, 190, 280, 290, 390, 680, 690, 780, 790

f: Focal length of the optical camera system group

Fno: Aperture value of the optical camera system group

HFOV: Half of the maximum angle of view in the optical camera system group

V2: Dispersion coefficient of the second lens

V3: Dispersion coefficient of the third lens

V4: Dispersion coefficient of the fourth lens

FOV: The largest viewing angle in the optical camera system group

R3: Radius of curvature of the object-side surface of the second lens

R4: Radius of curvature of the image-side surface of the second lens

R5: Radius of curvature of the object-side surface of the third lens

R6: Radius of curvature of the image-side surface of the third lens

R7: Radius of curvature of the object-side surface of the fourth lens

f1: The focal length of the first lens

f2: The focal length of the second lens

f4: Focal length of the fourth lens

f5: The focal length of the fifth lens

CT1: Thickness of the first lens on the optical axis

CT2: Thickness of the second lens on the optical axis

CT3: Thickness of the third lens on the optical axis

CT4: Thickness of the fourth lens on the optical axis

CT5: Thickness of the fifth lens on the optical axis

ΣCT: the sum of the thickness of each lens on the optical axis

T12: The distance between the first lens and the second lens on the optical axis

T23: The distance between the second lens and the third lens on the optical axis

T34: The distance between the third lens and the fourth lens on the optical axis

T45: The distance between the fourth lens and the fifth lens on the optical axis

ΣAT: The sum of the distances between two adjacent lenses on the optical axis

ImgH: Maximum image height of the optical camera system group

TD: The distance on the optical axis between the object-side surface of the lens that is closest to the subject along the optical axis and the image-side surface of the lens that is closest to the imaging surface along the optical axis

SD: The distance on the optical axis from the aperture to the image-side surface of the lens that is closest to the imaging surface along the optical axis

BL: The distance between the image-side surface of the lens that is closest to the imaging surface along the optical axis and the imaging surface on the optical axis

X: optical axis path in the first direction

Y: optical axis path in the second direction

TP: the sum of the lengths of the internal optical axis paths of a prism

TPx: the length of the optical axis path X in the first direction

TPy: the length of the optical axis path Y in the second direction

TP1: Sum of the lengths of the internal optical axis paths of the prism

TP2: Sum of the lengths of the internal optical axis paths of the prism

Yo: The effective radius of the lens surface that is closest to the subject along the optical axis in the lens

Yi: The effective radius of the lens surface that is closest to the imaging surface along the optical axis in the lens

Ymax: The maximum effective radius of all object-side surfaces and image-side surfaces of the lens

Ymin: The smallest effective radius in all object-side surfaces and image-side surfaces of the lens

VRO: Dispersion Coefficient of Object Reflection Element

VRI: Dispersion coefficient of the image end reflector

Dr1s: The distance from the object side surface of the first lens to the aperture on the optical axis

Dr2s: The distance from the image side surface of the first lens to the aperture on the optical axis

WPO: The width of the object-end reflective element parallel to the optical axis of the lens

WPI: The width of the image-end reflective element parallel to the optical axis of the lens

DP: The distance between the object-side reflective element and the image-side reflective element on the optical axis

T12i: When an object distance approaches infinity, the distance between the first lens and the second lens on the optical axis

T12m: When the object distance is 400mm, the distance between the first lens and the second lens on the optical axis

Tmax: the maximum thickness of the electronic device

Detailed ways

The present invention provides an optical camera system group, which includes a first lens, a second lens, a third lens, a fourth lens and a fifth lens along the optical axis from the object side to the image side in sequence. The total number of lenses in the optical camera system group is Five slices.

In the first lens, the second lens, the third lens, the fourth lens and the fifth lens of the optical camera system group mentioned in the previous paragraph, any two adjacent lenses have an air gap on the optical axis; that is to say, The optical camera system group may have five single non-bonded lenses. Since the manufacturing process of the cemented lens is more complicated than that of the non-cemented lens, especially the cemented surfaces of the two lenses need to have a high-precision curved surface, so as to achieve a high degree of closeness when the two lenses are cemented. Poor adhesion due to misalignment affects the overall optical imaging quality. Therefore, in the optical camera system group of the present invention, any two adjacent lenses can have an air gap on the optical axis, which can effectively improve the problems caused by the cemented lenses.

The first lens can have a positive refractive power, which can provide the main light converging ability of the optical camera system, so as to shorten the overall length thereof. Furthermore, the object-side surface of the first lens may be a convex surface, which enables the first lens to have strong refractive power, which is beneficial to the formation of the telephoto structure.

The second lens may have a negative refractive power, which can balance spherical aberration and chromatic aberration generated by the first lens, thereby buffering incident light.

The third lens may have a positive refractive power, which can balance the positive refractive power of the first lens and effectively guide light into the optical camera system group.

The fourth lens may have a negative refractive power, which helps to achieve a balance between the telephoto structure and the back focus to achieve a miniature telephoto effect.

The image-side surface of the fifth lens can be concave, which can help correct the aberrations of the optical camera system and achieve the effect of reducing the lens barrel. Furthermore, at least one of the object-side surface and the image-side surface of the fifth lens includes at least one inflection point, which can effectively control the angle of light incident on the imaging surface, so as to ensure that the effective diameter of the back focus will not be too large to affect. Scope of application of the optical camera system group.

The maximum angle of view in the optical camera system group is FOV, which satisfies the following conditions: 0.10<tan(FOV)<1.0. In this way, it is beneficial to capture distant images, so as to improve the resolution of local images, thereby achieving a telephoto effect. Preferably, the following conditions can be satisfied: 0.10<tan(FOV)<0.85. More preferably, the following conditions may be satisfied: 0.45<tan(FOV)<0.70.

The distance between the image-side surface of the lens that is closest to the imaging surface along the optical axis and the imaging surface on the optical axis is BL. The distance of the lens image side surface of the surface on the optical axis is TD, which satisfies the following conditions: 0.55<BL/TD<1.80. Thereby, the back focal length of the optical camera system group can be controlled to achieve sufficient focal length in a small space, so as to satisfy the telephoto characteristic and at the same time reduce the thickness of the optical camera system group. Preferably, the following conditions can be satisfied: 0.75<BL/TD<1.50.

The distance between the second lens and the third lens on the optical axis is T23, and the thickness of the first lens on the optical axis is CT1, which satisfies the following conditions: 0<T23/CT1<0.60. In this way, the first lens can be provided with a sufficient thickness to adapt to environmental changes and enhance the practicability of the mechanism, and at the same time, the space waste caused by the excessive distance between the second lens and the third lens can be avoided. Preferably, the following conditions can be satisfied: 0<T23/CT1<0.25.

The focal length of the optical camera system group is f, and the curvature radius of the object-side surface of the fourth lens is R7, which satisfies the following conditions: -9.50<f/R7<1.50. In this way, the curvature of the object-side surface of the fourth lens can be effectively controlled, so as to avoid serious aberrations caused by excessive curvature. Preferably, the following conditions can be satisfied: -6.50<f/R7<0.50.

The focal length of the optical camera system group is f, and the distance on the optical axis between the object-side surface of the lens that is closest to the subject along the optical axis and the image-side surface of the lens that is closest to the imaging surface along the optical axis on the optical axis is TD, which satisfies The following conditions: 1.50<f/TD<2.50. Thereby, the distribution of the focal length and the space of the lens can be balanced, so as to shorten the distribution length of the lens and the size of the effective diameter. Preferably, the following conditions can be satisfied: 1.72<f/TD<2.20.

The optical camera system group may further comprise an aperture, wherein the distance from the aperture to the image side surface of the lens that is closest to the imaging surface along the optical axis on the optical axis is SD, and the object side of the lens that is closest to the subject along the optical axis is SD. The distance on the optical axis between the surface and the image-side surface of the lens that is closest to the imaging surface along the optical axis is TD, which satisfies the following conditions: 0.80<SD/TD<1.10. Thereby, the position of the aperture can be effectively controlled to facilitate the formation of the telephoto structure, and at the same time, the total length of the optical camera system group can be controlled.

The focal length of the optical camera system group is f, and the focal length of the fourth lens is f4, which satisfy the following conditions: -1.0<f/f4<1.0. In this way, the refractive power of the fourth lens can be effectively balanced, so as to achieve a balance between the telephoto structure and the back focal length.

The focal length of the optical camera system group is f, and the focal length of the fifth lens is f5, which satisfies the following conditions: -1.0<f/f5<1.0. In this way, the refractive power of the fifth lens can be effectively balanced, so as to facilitate correction of off-axis aberrations.

The focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following conditions: |f1/f2|<1.0. Thereby, the distribution of the refractive power of the first lens and the second lens can be balanced, so as to shorten the total length and achieve the telephoto structure at the same time.

The sum of the thicknesses of each lens on the optical axis is ΣCT, and the sum of the distances between two adjacent lenses on the optical axis is ΣAT, which satisfies the following conditions: 3.0<ΣCT/ΣAT<5.0. Thereby, the proportion of the lens in the optical camera system group is appropriately allocated, so as to reduce the sensitivity and facilitate the assembly of the lens, and at the same time achieve the most efficient use of space.

The thickness of the first lens on the optical axis is CT1, and the sum of the thicknesses of the lenses on the optical axis is ΣCT, which satisfies the following conditions: 0.50<CT1/(ΣCT-CT1)<1.80. In this way, the structure of the first lens is relatively stable, so as to avoid environmental factors from affecting the imaging quality.

The dispersion coefficient of the second lens is V2, which satisfies the following condition: V2<27.0. Thereby, the chromatic aberration of the optical camera system group can be corrected.

The dispersion coefficient of the third lens is V3, which satisfies the following condition: V3<27.0. Thereby, the space volume of the optical camera system group can be reduced, so as to facilitate the miniaturization of the telephoto camera system group.

The dispersion coefficient of the fourth lens is V4, which satisfies the following condition: V4<27.0. Thereby, it is beneficial to reconcile the light of different wavelength bands to image on the same imaging plane, so as to avoid image overlapping.

The effective radius of the lens surface closest to the object along the optical axis is Yo, and the effective radius of the lens surface closest to the imaging surface along the optical axis is Yi, which satisfies the following conditions: 0.95<Yo/Yi<1.15. In this way, the light incident and output ranges of the optical camera system group are effectively controlled, so that the image brightness is relatively uniform.

The maximum effective radius in all object-side surfaces and image-side surfaces of the lens is Ymax, and the minimum effective radius in all object-side surfaces and image-side surfaces of the lens is Ymin, which satisfy the following conditions: 1.0<Ymax/Ymin<1.50. In this way, the effective radii of the lenses of the optical camera system group can be balanced, so as to avoid excessive differences in the ratios of the lenses to affect the lens forming efficiency.

The distance from the object-side surface of the first lens to the aperture on the optical axis is Dr1s, and the distance from the image-side surface of the first lens to the aperture on the optical axis is Dr2s, which satisfy the following conditions: 0<|Dr1s/Dr2s|<1.0. Thereby, the relative positions of the aperture and the first lens can be balanced to control the total length of the optical camera system group.

The curvature radius of the object-side surface of the second lens is R3, and the curvature radius of the image-side surface of the second lens is R4, which satisfy the following conditions: -1.5<(R3-R4)/(R3+R4)<0. In this way, the refractive power distribution of the second lens is concentrated in the object side direction, which can facilitate correction of astigmatism.

The curvature radius of the object-side surface of the third lens is R5, and the curvature radius of the image-side surface of the third lens is R6, which satisfy the following conditions: -2.0<(R5+R6)/(R5-R6)<1.0. In this way, the third lens is made more symmetrical, so as to improve the symmetry of the optical camera system group, thereby reducing aberrations.

The focal length of the optical camera system group is f, and the maximum image height of the optical camera system group is ImgH, which satisfies the following conditions: 3.0<f/ImgH<6.0. In this way, the ratio of the focal length of the optical camera system group to the light-receiving range of the imaging surface can be balanced, so as to avoid insufficient image brightness due to a too small light-receiving range. Preferably, the following conditions can be satisfied: 3.5<f/ImgH<4.5.

The first lens can be a moving focusing lens, and there is relative movement between the first lens and the second lens when focusing. There is no relative movement among any of the second lens, the third lens, the fourth lens and the fifth lens, so that most of the lenses can be fixed to avoid errors in operation, and the sensitivity of the optical camera system group can also be reduced. In the optical system, the object distance refers to the distance between the object and the object end of the optical camera system group on the optical axis. In the optical camera system group of the present invention, when an object distance approaches infinity, the separation distance between the first lens and the second lens on the optical axis is T12i, and when the object distance is 400mm, the first lens and the second lens The separation distance on the optical axis is T12m, which satisfies the following conditions: 0.50<T12i/T12m<0.95. By controlling the displacement ratio of the first lens to compensate for image blur caused by different object distances, this action can reduce the movement range of the mechanism, reduce energy consumption, and avoid excessive vibration of the overall mechanism resulting in noise.

The optical camera system group may further include at least one prism, which is arranged on the optical axis of the optical camera system group, so as to turn the optical path of the optical camera system group, and at the same time, it can reduce the optical path turning space required by the optical back focus, so as to facilitate the optical camera. Optimization of system groups. Specifically, the prism can be disposed between the object and the first lens along the optical axis or between the fifth lens and the imaging surface along the optical axis. The distance between the object-side surface of the lens closest to the subject and the image-side surface of the lens closest to the imaging surface on the optical axis is TD, and the sum of the lengths of the internal optical axis paths of at least one prism is TP, which satisfies the following: Condition: 0.80<TD/TP<1.25. In this way, the spatial distribution of the lens can be effectively controlled, and the prism can be used to reduce the volume of the optical camera system.

The present invention further provides an optical camera system group, which includes an object end reflection element, a plurality of lenses and an image end reflection element in sequence along an optical axis from the object side to the image side. Both the object-side reflective element and the image-side reflective element have no refractive power. At least one surface of at least one of the lenses is aspheric and includes at least one inflection point. There is no lens disposed along the optical axis between the object-end reflecting element and the subject, and no lens is disposed along the optical axis between the image-end reflecting element and the imaging surface.

The total number of lenses in the aforementioned optical camera system group can be five, and the first lens, the second lens, the third lens, the fourth lens and the fifth lens along the optical axis from the object side to the image side, and the relevant conditions can refer to the aforementioned The content is not repeated here.

Both the fourth lens and the fifth lens have at least one surface that is aspherical. Thereby, peripheral aberration can be corrected favorably.

The width of the object end reflection element parallel to the optical axis of the lens is WPO, the width of the image end reflection element parallel to the optical axis of the lens is WPI, and the focal length of the optical camera system group is f, which satisfies the following conditions: 0.70<(WPO +WPI)/f<1.50. By adjusting the size of the reflective element and achieving a balance with the focal length of the optical camera system group, the space utilization efficiency of the overall electronic device can be improved.

The object-end reflective element and the image-end reflective element can be made of glass or plastic, and can be a prism or a mirror, wherein the reflective element is plastic, which can reduce cost, reduce weight, and increase the number of optical camera systems. Variability; while the reflective element is a prism, which is beneficial to space distribution, so that the system has enough light path turning space. The dispersion coefficient of the reflection element at the object end is VRO, and the dispersion coefficient of the reflection element at the image end is VRI, which satisfy the following conditions: VRO<60.0; and VRI<60.0. In this way, the electronic device has less space to achieve the effect of turning the light path, which can be beneficial to reduce the size of the prism, thereby reducing the volume of the electronic device.

The distance between the object-side reflective element and the image-side reflective element on the optical axis is DP, the width of the object-side reflective element parallel to the optical axis of the lens is WPO, and the width of the image-side reflective element parallel to the optical axis of the lens is WPI , which satisfies the following conditions: 0.50<DP/(WPO+WPI)<0.80. In this way, the formation of the telephoto structure can be facilitated, the volume of the optical camera system group can be effectively reduced, and the space of the optical camera system group can be used for the most efficient application.

An incident light incident from the object-end reflective element and an outgoing light from the image-end reflective element are located on the same side of the optical axis of the lens. Thereby, the space can be fully utilized, so that the space planning of the whole electronic device is more consistent.

The optical camera system group may include at least three lenses, and the dispersion coefficients of the three lenses are all less than 27.0. Thereby, it is beneficial to miniaturize the optical camera system group with telephoto function, so as to reduce its volume, and at the same time, it can correct chromatic aberration.

The focal length of the first lens is f1, the focal length of the second lens is f2, and the focal length of the optical camera system group is f, which satisfies the following conditions: 3.30<|f/f1|+|f/f2|<5.80. In this way, the object side direction has a strong inflection force distribution, so as to achieve the telephoto effect.

In the optical camera system set provided by the present invention, the material of the lens can be plastic or glass. When the material of the lens is plastic, the production cost can be effectively reduced. In addition, when the material of the lens is glass, the degree of freedom of the configuration of the refractive power of the optical camera system group can be increased. In addition, the object-side surface and the image-side surface of the optical camera system group can be aspherical surfaces (ASP), and the aspherical surfaces can be easily made into shapes other than spherical surfaces, so as to obtain more control variables to reduce aberrations and reduce the size of the lens. Therefore, the total length of the optical camera system group of the present invention can be effectively reduced.

Furthermore, in the optical camera system set provided by the present invention, if the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface can be convex at the near optical axis; if the lens surface is concave and the concave surface is not defined position, it means that the lens surface can be concave at the near optical axis. In the optical camera system set provided by the present invention, if the lens has positive refractive power or negative refractive power, or the focal length of the lens, it may refer to the refractive power or focal length at the near optical axis of the lens.

In addition, in the optical camera system group of the present invention, at least one aperture can be set as required to reduce stray light and help improve image quality.

The imaging surface of the optical camera system group of the present invention can be a plane or a curved surface with any curvature, especially a curved surface with a concave surface facing the object side, depending on the corresponding electronic photosensitive element.

In the optical camera system group of the present invention, the aperture configuration can be a front aperture or a middle aperture, wherein the front aperture means that the aperture is set between the subject and the first lens, and the middle aperture means that the aperture is set between the first lens and the imaging plane. If the aperture is a front aperture, the exit pupil (Exit Pupil) of the optical camera system group can be made a long distance from the imaging surface, so that it has a telecentric (Telecentric) effect, and the CCD or CMOS reception of the electronic photosensitive element can be increased. The efficiency of the image; if it is a central aperture, it will help to expand the field of view of the system, so that the optical camera system group has the advantages of a wide-angle lens.

The optical camera system set of the present invention can also be applied to three-dimensional (3D) image capture, digital cameras, mobile products, digital flat panels, smart TVs, network monitoring equipment, somatosensory game consoles, driving recorders, reversing developing devices and wearables. type products and other electronic devices.

The present invention provides an imaging device, comprising the aforementioned optical camera system group and an electronic photosensitive element, wherein the electronic photosensitive element is arranged on the imaging surface of the optical camera system group. In the imaging device, the optical image stabilization is performed by moving the optical camera system group, for example, with an optical image stabilization (Optical Image Stabilization; OIS). In this way, image blur caused by factors such as insufficient light or hand shake can be corrected and compensated. Preferably, the imaging device may further include a lens barrel (Barrel Member), a supporting device (Holder Member) or a combination thereof.

The present invention provides an electronic device, including the aforementioned imaging device, wherein the thickness of the electronic device is smaller than the focal length of an optical camera system group of the imaging device. Thereby, the image quality is improved. Thereby, it is beneficial to the miniaturization of the electronic device, and at the same time, it can be applied to a wider range of applications. Preferably, the electronic device may further include a control unit (Control Unit), a display unit (Display), a storage unit (Storage Unit), a random access memory (RAM) or a combination thereof.

According to the above-mentioned embodiments, specific embodiments are provided below and described in detail with reference to the accompanying drawings.

<First Embodiment>

Please refer to FIG. 1A and FIG. 2 , wherein FIG. 1A is a schematic diagram of an optical camera system set according to a first embodiment of the present invention, and FIG. 2 shows spherical aberration, astigmatism and astigmatism of the first embodiment in order from left to right. Distort graphs. As can be seen from FIG. 1A , the optical camera system group of the first embodiment includes a prism 180 , an aperture 100 , a first lens 110 , a second lens 120 , a third lens 130 , and a fourth lens along the optical axis in sequence from the object side to the image side. 140, the fifth lens 150, the filter element 160, the prism 190 and the imaging surface 170, wherein the total number of lenses in the optical camera system group is five (110-150), and any two adjacent lenses in the optical camera system group are located between There is an air space on the optical axis.

The first lens 110 has a positive refractive power and is made of plastic material. The object-side surface 111 is convex, and the image-side surface 112 is convex, and both are aspherical.

The second lens 120 has a negative refractive power and is made of plastic material. The object-side surface 121 is concave, and the image-side surface 122 is convex, both of which are aspherical.

The third lens 130 has a positive refractive power and is made of plastic material, and its object-side surface 131 is convex, and its image-side surface 132 is convex, and both are aspherical.

The fourth lens 140 has a negative refractive power and is made of plastic material, and its object-side surface 141 is concave, and its image-side surface 142 is convex, and both are aspherical.

The fifth lens 150 has a negative refractive power and is made of plastic material. The object-side surface 151 is convex, and the image-side surface 152 is concave, both of which are aspherical. In addition, the object-side surface 151 and the image-side surface 152 of the fifth lens 150 both include at least one inflection point.

The filter element 160 is made of glass, and is disposed between the fifth lens 150 and the imaging surface 170 and does not affect the focal length of the optical camera system group.

The optical camera system group of the first embodiment includes two prisms 180 and 190 , both of which are made of glass. The prism 180 can be regarded as an object-end reflection element, which is arranged on the optical path between the object (not shown) and the aperture 100 (in the first embodiment, it is arranged on the optical axis of the optical camera system group), and the prism 190 is visible. It is an image end reflection element, which is arranged on the optical path between the filter element 160 and the imaging surface 170 (in the first embodiment, it is arranged on the optical axis of the optical camera system group).

The curve equations of the aspheric surfaces of the above-mentioned lenses are expressed as follows:

in:

X: the point on the aspheric surface whose distance from the optical axis is Y, the relative distance from the point tangent to the intersection point on the optical axis of the aspheric surface;

Y: the vertical distance between the point on the aspheric curve and the optical axis;

R: radius of curvature;

k: cone coefficient; and

Ai: i-th order aspheric coefficient.

In the optical camera system group of the first embodiment, the focal length of the optical camera system group is f, the aperture value (f-number) of the optical camera system group is Fno, and the half of the maximum angle of view in the optical camera system group is HFOV, and the values are as follows: : f=10.00 mm; Fno=2.80; and HFOV=14.0 degrees.

In the optical camera system group of the first embodiment, the dispersion coefficient of the second lens 120 is V2, the dispersion coefficient of the third lens 130 is V3, and the dispersion coefficient of the fourth lens 140 is V4, which satisfy the following conditions: V2=20.4; V3=20.4; and V4=20.4.

In the optical camera system group of the first embodiment, the maximum angle of view in the optical camera system group is FOV, which satisfies the following condition: tan(FOV)=0.53.

In the optical camera system group of the first embodiment, the distance between the second lens 120 and the third lens 130 on the optical axis is T23, and the thickness of the first lens 110 on the optical axis is CT1, which satisfies the following conditions: T23/ CT1=0.07.

In the optical imaging system group of the first embodiment, the radius of curvature of the object-side surface 121 of the second lens is R3, and the radius of curvature of the image-side surface 122 of the second lens is R4, which satisfy the following conditions: (R3-R4)/(R3 +R4)=-0.48.

In the optical imaging system group of the first embodiment, the radius of curvature of the object-side surface 131 of the third lens is R5, and the radius of curvature of the image-side surface 132 of the third lens is R6, which satisfy the following conditions: (R5+R6)/(R5 -R6)=-0.33.

In the optical imaging system group of the first embodiment, the focal length of the optical imaging system group is f, and the curvature radius of the object-side surface 141 of the fourth lens is R7, which satisfy the following condition: f/R7=-4.98.

In the optical imaging system group of the first embodiment, the focal length of the first lens 110 is f1, and the focal length of the second lens 120 is f2, which satisfy the following condition: |f1/f2|=0.87.

In the optical imaging system group of the first embodiment, the focal length of the optical imaging system group is f, the focal length of the fourth lens 140 is f4, and the focal length of the fifth lens 150 is f5, which satisfy the following conditions: f/f4=-0.57; and f/f5=-0.31.

In the optical imaging system group of the first embodiment, the focal length of the first lens 110 is f1, the focal length of the second lens 120 is f2, and the focal length of the optical imaging system group is f, which satisfy the following conditions: |f/f1|+| f/f2|=3.97.

In the optical camera system group of the first embodiment, the thickness of the first lens 110 on the optical axis is CT1, the thickness of the second lens 120 on the optical axis is CT2, the thickness of the third lens 130 on the optical axis is CT3, The thickness of the fourth lens 140 on the optical axis is CT4, the thickness of the fifth lens 150 on the optical axis is CT5, and the sum of the thicknesses of each lens on the optical axis is ΣCT (ie, ΣCT=CT1+CT2+CT3+CT4+CT5 ), which satisfies the following conditions: CT1/(ΣCT-CT1)=1.29.

In the optical camera system group of the first embodiment, the sum of the thicknesses of the lenses on the optical axis is ΣCT, the distance between the first lens 110 and the second lens 120 on the optical axis is T12, and the second lens 120 and the third lens 130 is separated by a distance of T23 on the optical axis, the third lens 130 and the fourth lens 140 are separated by a distance of T34 on the optical axis, and the fourth lens 140 and the fifth lens 150 are separated by a distance of T45 on the optical axis. The sum of the distances of the lenses on the optical axis is ΣAT (ie, ΣAT=T12+T23+T34+T45), which satisfies the following conditions: ΣCT/ΣAT=4.39.

In the optical imaging system group of the first embodiment, the focal length of the optical imaging system group is f, and the maximum image height of the optical imaging system group is ImgH, which satisfies the following condition: f/ImgH=3.97.

Referring to FIG. 19 , it is a schematic diagram illustrating parameters in the optical camera system group of the first embodiment. As can be seen from FIG. 19 , the object-side surface of the lens (in the first embodiment, the object-side surface 111 of the first lens) that is closest to the subject along the optical axis and the lens image that is closest to the imaging surface 170 along the optical axis in the lens The distance between the side surface (in the first embodiment, the image side surface 152 of the fifth lens) on the optical axis is TD, and the focal length of the optical imaging system group is f, which satisfies the following condition: f/TD=1.97.

In the optical camera system group of the first embodiment, the image-side surface of the lens (in the first embodiment, the image-side surface 152 of the fifth lens) that is closest to the imaging surface 170 along the optical axis of the aperture 100 to the lens is on the optical axis. The distance is SD, the lens object side surface (in the first embodiment, the first lens object side surface 111) that is closest to the subject along the optical axis and the lens image side that is closest to the imaging surface 170 along the optical axis The distance between the surface (in the first embodiment, the image-side surface 152 of the fifth lens) on the optical axis is TD, which satisfies the following condition: SD/TD=0.86.

In the optical camera system group of the first embodiment, the image-side surface of the lens closest to the imaging surface 170 along the optical axis (in the first embodiment, refers to the image-side surface 152 of the fifth lens) and the imaging surface 170 are on the optical axis. The distance is BL, the lens object-side surface (in the first embodiment, the first lens object-side surface 111) that is closest to the subject along the optical axis and the lens image that is closest to the imaging surface 170 along the optical axis The distance between the side surface (in the first embodiment, the image side surface 152 of the fifth lens) on the optical axis is TD, which satisfies the following condition: BL/TD=1.25.

Referring to FIG. 20 , it is a schematic diagram illustrating the parameter TP in the optical camera system group according to the first embodiment. It can be seen from FIG. 20 that the total length TP of the internal optical axis path of a prism is the length TPx of the optical axis path X in the first direction (ie, the optical axis length from the incident surface of the prism to the reflection surface of the prism) and the optical axis path Y in the second direction. The sum of the lengths TPy (that is, the length of the optical axis from the prism reflection surface to the prism exit surface), that is, TP=TPx+TPy. Since the optical camera system group of the first embodiment includes two prisms 180 and 190 , the parameter symbols TP1 and TP2 respectively represent the sum of the lengths of the internal optical axis paths of the two prisms 180 and 190 , and the parameters thereof are not shown separately. Schematic. In detail, referring to FIGS. 19 and 20 , in the optical camera system group of the first embodiment, the lens object side surface (in the first embodiment, the first lens object is closest to the subject along the optical axis) The distance on the optical axis between the side surface 111) and the lens image side surface (in the first embodiment, the fifth lens image side surface 152) that is closest to the imaging surface 170 along the optical axis is TD, and the internal light of the prism 180 is TD. The sum of the lengths of the axis paths is TP1, and the sum of the lengths of the internal optical axis paths of the prism 190 is TP2 (wherein TP1 and TP2 both satisfy the TP defined in FIGS. 1A to 1C of the accompanying drawings, the description and the claims), which satisfy The following conditions: TD/TP1=1.02; and TD/TP2=1.00.

Referring to FIG. 19 , in the optical camera system group of the first embodiment, the effective radius of the lens surface along the optical axis that is closest to the object (in the first embodiment, refers to the effective radius of the object-side surface 111 of the first lens) is Yo, the effective radius of the lens surface closest to the imaging surface 170 along the optical axis in the lens (in the first embodiment, refers to the effective radius of the image-side surface 152 of the fifth lens) is Yi, which satisfies the following conditions: Yo/Yi=1.06 .

In the optical imaging system group of the first embodiment, the maximum effective radius (in the first embodiment, the object-side surface 111 of the first lens) of the object-side surface and the image-side surface of the lens is Ymax, and the object-side surface of the lens is Ymax. The minimum effective radius of the surface and the image-side surface (in the first embodiment, refers to the image-side surface 132 of the third lens) is Ymin, which satisfies the following condition: Ymax/Ymin=1.30.

In the optical camera system group of the first embodiment, the prism 180 can be regarded as an object-end reflection element, the prism 190 can be regarded as an image-end reflection element, the dispersion coefficient of the object-end reflection element is VRO, and the dispersion coefficient of the image-end reflection element is VRI. , which satisfies the following conditions: VRO=64.2; and VRI=64.2.

Referring to FIG. 19 , in the optical camera system group of the first embodiment, the distance between the object-side surface 111 of the first lens and the aperture 100 on the optical axis is Dr1s, and the distance between the image-side surface 112 of the first lens and the aperture 100 on the optical axis is Dr1s. The distance is Dr2s, which satisfies the following condition: |Dr1s/Dr2s|=0.45.

Referring to FIG. 19 , in the optical camera system group of the first embodiment, the width of the object-end reflective element (ie, the prism 180 ) parallel to the optical axis of the lens is WPO, and the image-end reflective element (ie, the prism 190 ) is parallel to the width of the lens. The width in the optical axis direction is WPI, and the focal length of the optical camera system group is f, which satisfies the following condition: (WPO+WPI)/f=1.01.

Referring to FIG. 19 , in the optical camera system group of the first embodiment, the distance between the object-end reflecting element (ie the prism 180 ) and the image-end reflecting element (ie the prism 190 ) on the optical axis is DP, and the object-end reflecting element ( That is, the width of the prism 180 parallel to the optical axis of the lens is WPO, and the width of the image end reflection element (ie the prism 190) parallel to the optical axis of the lens is WPI, which satisfies the following conditions: DP/(WPO+WPI)= 0.59.

Please refer to Table 1 and Table 2 below.

Table 1 shows the detailed structural data of the first embodiment of FIG. 1A , wherein the units of the radius of curvature, thickness and focal length are mm, and surfaces 0-18 represent the surfaces from the object side to the image side in sequence. Table 2 is the aspherical surface data in the first embodiment, wherein k represents the cone surface coefficient in the aspherical curve equation, and A4-A14 represent the 4th-14th order aspherical surface coefficients of each surface. In addition, the following tables of the embodiments are schematic diagrams and aberration curves corresponding to the embodiments, and the definitions of the data in the tables are the same as those in Tables 1 and 2 of the first embodiment, and will not be repeated here.

1B and FIG. 1C , wherein FIG. 1B and FIG. 1C respectively illustrate schematic diagrams of the optical camera system set according to the first embodiment of FIG. 1A with prisms 180 and 190 of different shapes and arrangements. The optical data of the prisms 180 and 190 in FIG. 1B and FIG. 1C are the same as those of the prisms 180 and 190 in the above table 1, and the difference is only in their shape and arrangement, so that the light path of the incident light incident on the optical camera system group is different from that of the prisms 180 and 190 in the above table 1. The light path of the outgoing light imaged on the imaging surface 170 is turned, which is helpful to be mounted on more diverse imaging devices or electronic devices. It is worth mentioning that, in FIG. 1B , an incident light incident from the object-end reflective element (prism 180 ) and an outgoing light from the image-end reflective element (prism 190 ) are located on the same side of the optical axis of the lens.

<Second Embodiment>

Please refer to FIG. 3A , FIG. 4A and FIG. 4B , wherein FIG. 3A is a schematic diagram of an optical camera system group according to a second embodiment of the present invention, and FIG. 4A is an optical camera system group of the second embodiment in order from left to right Graph of spherical aberration, astigmatism and distortion with an object distance of infinity. Fig. 4B is a graph of spherical aberration, astigmatism and distortion with an object distance of 400mm for the optical camera system of the second embodiment from left to right. . As can be seen from FIG. 3A , the optical camera system group of the second embodiment includes a prism 280 , an aperture 200 , a first lens 210 , a second lens 220 , a third lens 230 , and a fourth lens along the optical axis in sequence from the object side to the image side. 240, the fifth lens 250, the filter element 260, the prism 290 and the imaging surface 270, wherein the total number of lenses in the optical camera system group is five (210-250), and any two adjacent lenses in the optical camera system group are located between There is an air space on the optical axis.

The first lens 210 has a positive refractive power and is made of plastic material. The object-side surface 211 is convex, and the image-side surface 212 is convex, and both are aspherical. In the second embodiment, the first lens 210 is a moving focusing lens, and there is relative movement between the first lens 210 and the second lens 220 during focusing. In FIG. 3A , the double down arrows below the first lens 210 indicate that they can be relative to each other. The second lens 220 moves along the optical axis. There is no relative movement between any of the second lens 220 , the third lens 230 , the fourth lens 240 and the fifth lens 250 .

The second lens 220 has a negative refractive power and is made of plastic material, and its object-side surface 221 is concave, and its image-side surface 222 is convex, and both are aspherical.

The third lens 230 has a positive refractive power and is made of plastic material, and its object-side surface 231 is convex, and its image-side surface 232 is convex, and both are aspherical.

The fourth lens 240 has a negative refractive power and is made of plastic material. The object-side surface 241 is concave, and the image-side surface 242 is convex, both of which are aspherical.

The fifth lens 250 has a positive refractive power and is made of plastic material. The object-side surface 251 is convex, and the image-side surface 252 is concave, both of which are aspherical. In addition, the object-side surface 251 and the image-side surface 252 of the fifth lens 250 both include at least one inflection point.

The filter element 260 is made of glass, and is disposed between the fifth lens 250 and the imaging surface 270 and does not affect the focal length of the optical camera system group.

The optical camera system group of the second embodiment includes two prisms 280 and 290 , both of which are made of glass. The prism 280 can be regarded as an object-end reflection element, which is arranged on the optical path between the object (not shown) and the aperture 200 (in the second embodiment, it is arranged on the optical axis of the optical camera system group), and the prism 290 is visible. It is an image end reflection element, which is arranged on the optical path between the filter element 260 and the imaging surface 270 (in the second embodiment, it is arranged on the optical axis of the optical camera system group).

Please refer to Table 3 and Table 4 below.

In the second embodiment, the curve equation of the aspheric surface is expressed as in the form of the first embodiment. In addition, the parameters in the following table that have appeared in the first embodiment are all the same as the definitions in the first embodiment, and will not be repeated here. The conditions of the two data are listed, from left to right are the object distance and Infinity Data with 400mm status.

In addition, because in the second embodiment, the first lens 210 is a moving focus lens, when an object distance approaches infinity, the separation distance between the first lens 210 and the second lens 220 on the optical axis is T12i. When the distance is 400mm, the separation distance between the first lens 210 and the second lens 220 on the optical axis is T12m, and the condition T12i/T12m satisfies the data in the following table.

With the help of Tables 3 and 4, the following data can be deduced:

3B and FIG. 3C , wherein FIG. 3B and FIG. 3C respectively illustrate schematic diagrams of the optical camera system set according to the second embodiment of FIG. 3A with prisms 280 and 290 of different shapes and arrangements. The optical data of the prisms 280 and 290 in FIGS. 3B and 3C are the same as those of the prisms 280 and 290 in Table 3 above. The only difference lies in their shape and arrangement. The optical path of the outgoing light imaged on the imaging surface 270 is turned, which is helpful to be mounted on more diverse imaging devices or electronic devices. It is worth mentioning that, in FIG. 3B , an incident light incident from the object-end reflective element (prism 280 ) and an outgoing light from the image-end reflective element (prism 290 ) are located on the same side of the optical axis of the lens.

<Third Embodiment>

Please refer to FIGS. 5A and 6 , wherein FIG. 5A is a schematic diagram of an optical camera system set according to a third embodiment of the present invention, and FIG. 6 shows spherical aberration, astigmatism and astigmatism of the third embodiment in order from left to right. Distort the graph. As can be seen from FIG. 5A , the optical imaging system group of the third embodiment includes an aperture 300 , a first lens 310 , a second lens 320 , a third lens 330 , a fourth lens 340 , a Five lenses 350, filter elements 360, prisms 390 and imaging surface 370, wherein the total number of lenses in the optical camera system group is five (310-350), and any two adjacent lenses in the optical camera system group are on the optical axis All have an air space.

The first lens 310 has a positive refractive power and is made of plastic material. The object-side surface 311 is convex, and the image-side surface 312 is convex, and both are aspherical.

The second lens 320 has a negative refractive power and is made of plastic material. The object-side surface 321 is concave, and the image-side surface 322 is convex, both of which are aspherical.

The third lens 330 has a positive refractive power and is made of plastic material. The object-side surface 331 is convex, and the image-side surface 332 is convex, and both are aspherical.

The fourth lens 340 has a negative refractive power and is made of plastic material, and its object-side surface 341 is concave, and its image-side surface 342 is convex, and both are aspherical.

The fifth lens 350 has a negative refractive power and is made of plastic material. The object-side surface 351 is convex, and the image-side surface 352 is concave, both of which are aspherical. In addition, the object-side surface 351 and the image-side surface 352 of the fifth lens 350 both include at least one inflection point.

The filter element 360 is made of glass, and is disposed between the fifth lens 350 and the imaging surface 370 and does not affect the focal length of the optical camera system group.

The optical camera system group of the third embodiment includes a prism 390, which is made of glass. The prism 390 can be regarded as an image end reflection element, and is disposed on the optical path between the filter element 360 and the imaging surface 370 (in the third embodiment, disposed on the optical axis of the optical camera system group).

Please refer to Table 5 and Table 6 below.

In the third embodiment, the curve equation of the aspheric surface is expressed as in the form of the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not repeated here.

With the help of Tables 5 and 6, the following data can be deduced:

Referring again to FIG. 5B , it is a schematic diagram of the optical camera system set according to the third embodiment of FIG. 5A with prisms 390 of different shapes and arrangements. The optical data of the prisms 390 in FIG. 5B are all the same as those of the prisms 390 in the above-mentioned Table 5, and the difference is only in their shapes and setting methods. The light path of the incident light is turned, which is helpful to be mounted on more diverse imaging devices or electronic devices.

<Fourth Embodiment>

Please refer to FIGS. 7 and 8 , wherein FIG. 7 is a schematic diagram of an optical camera system set according to a fourth embodiment of the present invention, and FIG. 8 shows spherical aberration, astigmatism and astigmatism of the fourth embodiment from left to right. Distort graphs. It can be seen from FIG. 7 that the optical camera system group of the fourth embodiment includes an aperture 400, a first lens 410, a second lens 420, a third lens 430, a fourth lens 440, a The five lenses 450, the filter element 460 and the imaging surface 470, wherein the total number of lenses in the optical camera system group is five (410-450), and any two adjacent lenses in the optical camera system group have one lens on the optical axis. Air spacer.

The first lens 410 has a positive refractive power and is made of plastic material, and its object-side surface 411 is convex, and its image-side surface 412 is convex, and both are aspherical.

The second lens 420 has a negative refractive power and is made of plastic material. The object-side surface 421 is concave, and the image-side surface 422 is convex, and both are aspherical.

The third lens 430 has a positive refractive power and is made of plastic material. The object-side surface 431 is convex, and the image-side surface 432 is convex, and both are aspherical.

The fourth lens 440 has a negative refractive power and is made of plastic material. The object-side surface 441 is concave, and the image-side surface 442 is concave, both of which are aspherical.

The fifth lens 450 has a positive refractive power and is made of plastic material. The object-side surface 451 is convex, and the image-side surface 452 is concave, both of which are aspherical. In addition, the object-side surface 451 and the image-side surface 452 of the fifth lens 450 both include at least one inflection point.

The filter element 460 is made of glass, and is disposed between the fifth lens 450 and the imaging surface 470 and does not affect the focal length of the optical camera system group.

Please refer to Table 7 and Table 8 below.

In the fourth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not repeated here.

With the help of Tables 7 and 8, the following data can be deduced:

<Fifth Embodiment>

Please refer to FIGS. 9 and 10 , wherein FIG. 9 is a schematic diagram of an optical camera system set according to a fifth embodiment of the present invention, and FIG. 10 shows spherical aberration, astigmatism and astigmatism of the fifth embodiment in order from left to right. Distort graphs. As can be seen from FIG. 9 , the optical camera system group of the fifth embodiment includes an aperture 500 , a first lens 510 , a second lens 520 , a third lens 530 , a fourth lens 540 , a The five lenses 550, the filter element 560 and the imaging surface 570, wherein the total number of lenses in the optical camera system group is five (510-550), and any two adjacent lenses in the optical camera system group have one lens on the optical axis. Air spacer.

The first lens 510 has a positive refractive power and is made of plastic material. The object-side surface 511 is convex, and the image-side surface 512 is concave, both of which are aspherical.

The second lens 520 has a negative refractive power and is made of plastic material, and its object-side surface 521 is concave, and its image-side surface 522 is convex, and both are aspherical.

The third lens 530 has a positive refractive power and is made of plastic material. The object-side surface 531 is convex, and the image-side surface 532 is concave, both of which are aspherical.

The fourth lens 540 has a positive refractive power and is made of plastic material, and its object-side surface 541 is concave, and its image-side surface 542 is convex, and both are aspherical.

The fifth lens 550 has a negative refractive power and is made of plastic material. The object-side surface 551 is concave, and the image-side surface 552 is concave, both of which are aspherical. In addition, the image-side surface 552 of the fifth lens 550 includes at least one inflection point.

The filter element 560 is made of glass, and is disposed between the fifth lens 550 and the imaging surface 570 and does not affect the focal length of the optical camera system group.

Please refer to Table 9 and Table 10 below.

In the fifth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not repeated here.

With the help of Table 9 and Table 10, the following data can be deduced:

<Sixth Embodiment>

Please refer to FIGS. 11A and 12 , wherein FIG. 11A is a schematic diagram of an optical camera system set according to a sixth embodiment of the present invention, and FIG. 12 shows spherical aberration, astigmatism and astigmatism of the sixth embodiment in order from left to right. Distort graphs. As can be seen from FIG. 11A , the optical camera system group of the sixth embodiment includes a prism 680 , an aperture 600 , a first lens 610 , a second lens 620 , a third lens 630 , and a fourth lens along the optical axis in sequence from the object side to the image side 640, the fifth lens 650, the filter element 660, the prism 690 and the imaging surface 670, wherein the total number of lenses in the optical camera system group is five (610-650), and any two adjacent lenses in the optical camera system group are located between There is an air space on the optical axis.

The first lens 610 has a positive refractive power and is made of plastic material. The object-side surface 611 is convex, and the image-side surface 612 is convex, and both are aspherical.

The second lens 620 has a negative refractive power and is made of plastic material. The object-side surface 621 is concave, and the image-side surface 622 is convex, and both are aspherical.

The third lens 630 has a positive refractive power and is made of plastic material. The object-side surface 631 is convex, and the image-side surface 632 is convex, and both are aspherical.

The fourth lens 640 has a negative refractive power and is made of plastic material. The object-side surface 641 is concave, and the image-side surface 642 is convex, and both are aspherical.

The fifth lens 650 has a negative refractive power and is made of plastic material. The object-side surface 651 is convex, and the image-side surface 652 is concave, both of which are aspherical. In addition, the object-side surface 651 and the image-side surface 652 of the fifth lens 650 both include at least one inflection point.

The filter element 660 is made of glass, and is disposed between the fifth lens 650 and the imaging surface 670 and does not affect the focal length of the optical camera system group.

The optical camera system group of the sixth embodiment includes prisms 680 and 690 , which are all made of plastic. The prism 680 can be regarded as an object-end reflection element, which is arranged on the optical path between the object (not shown) and the aperture 600 (in the sixth embodiment, it is arranged on the optical axis of the optical camera system group), and the prism 690 is visible. It is an image end reflection element, which is arranged on the optical path between the filter element 660 and the imaging surface 670 (in the sixth embodiment, it is arranged on the optical axis of the optical camera system group).

For further cooperation, refer to Table 11 and Table 12 below.

In the sixth embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment. In addition, the definitions of the parameters in the following table are the same as those in the first embodiment, and are not repeated here.

According to Table 11 and Table 12, the following data can be deduced:

11B and FIG. 11C , wherein FIG. 11B and FIG. 11C respectively illustrate schematic diagrams of the optical camera system set according to the sixth embodiment of FIG. 11A with prisms 680 and 690 of different shapes and arrangements. The optical data of the prisms 680 and 690 in FIGS. 11B and 11C are the same as those of the prisms 680 and 690 in the above Table 11. The only difference lies in their shape and arrangement. Diverting the light path of the outgoing light imaged on the imaging surface 670 is helpful to be mounted on more diverse imaging devices or electronic devices. It is worth mentioning that in FIG. 11B , an incident light incident from the object-end reflective element (prism 680 ) and an outgoing light from the image-end reflective element (prism 690 ) are located on the same side of the optical axis of the lens.

<Seventh Embodiment>

Please refer to FIGS. 13A , 14A and 14B, wherein FIG. 13A is a schematic diagram of an optical camera system group according to a seventh embodiment of the present invention, and FIG. 14A is an optical camera system group of the seventh embodiment in order from left to right Graph of spherical aberration, astigmatism and distortion of object distance with infinity . As can be seen from FIG. 13A , the optical camera system group of the seventh embodiment includes a prism 780 , an aperture 700 , a first lens 710 , a second lens 720 , a third lens 730 , and a fourth lens along the optical axis in sequence from the object side to the image side. 740, the fifth lens 750, the filter element 760, the prism 790 and the imaging surface 770, wherein the total number of lenses in the optical camera system group is five (710-750), and any two adjacent lenses in the optical camera system group are located between There is an air space on the optical axis.

The first lens 710 has a positive refractive power and is made of plastic material. The object-side surface 711 is convex, and the image-side surface 712 is convex, and both are aspherical. In the seventh embodiment, the first lens 710 is a moving focusing lens, and there is relative movement between the first lens 710 and the second lens 720 during focusing. In FIG. 13A , the double down arrow below the first lens 710 indicates that they can be relative to each other. The second lens 720 moves along the optical axis.

The second lens 720 has a negative refractive power and is made of plastic material. The object-side surface 721 is concave, and the image-side surface 722 is convex, both of which are aspherical.

The third lens 730 has a positive refractive power and is made of plastic material. The object-side surface 731 is convex, and the image-side surface 732 is convex, and both are aspherical.

The fourth lens 740 has a negative refractive power and is made of plastic material, and its object-side surface 741 is concave, and its image-side surface 742 is convex, and both are aspherical.

The fifth lens 750 has a positive refractive power and is made of plastic material. The object-side surface 751 is convex, and the image-side surface 752 is concave, both of which are aspherical. In addition, the object-side surface 751 and the image-side surface 752 of the fifth lens 750 both include at least one inflection point.

The filter element 760 is made of glass, which is disposed between the fifth lens 750 and the imaging surface 770 and does not affect the focal length of the optical camera system group.

The optical camera system group of the seventh embodiment includes two prisms 780 and 790 , both of which are made of plastic. The prism 780 can be regarded as an object-end reflective element, and is arranged on the optical path between the object (not shown) and the aperture 700 (in the seventh embodiment, it is arranged on the optical axis of the optical camera system group), and the prism 790 is visible. It is an image end reflection element, which is arranged on the optical path between the filter element 760 and the imaging surface 770 (in the seventh embodiment, it is arranged on the optical axis of the optical camera system group).

For further cooperation, refer to Table 13 and Table 14 below.

In the seventh embodiment, the curve equation of the aspheric surface is expressed as in the first embodiment. In addition, the parameters in the following table that have appeared in the first embodiment and the second embodiment have the same definitions, and will not be repeated here. The conditions of the two data are listed, from left to right, the object distance is Infinity and 400mm state data.

With the help of Table 13 and Table 14, the following data can be deduced:

13B and FIG. 13C, in which FIG. 13B and FIG. 13C are respectively shown according to FIG. 13A

A schematic diagram of the optical camera system set in the seventh embodiment with prisms 780 and 790 of different shapes and arrangements. The optical data of the prisms 780 and 790 in FIGS. 13B and 13C are the same as those of the prisms 780 and 790 in Table 13 above. The only difference lies in their shape and arrangement. Diverting the light path of the outgoing light imaged on the imaging surface 770 is helpful to be mounted on more diverse imaging devices or electronic devices. In FIG. 13B, an incident light incident from the object-end reflective element (prism 780) and an outgoing light from the image-end reflective element (prism 790) are located on the same side of the optical axis of the lens.

<Eighth Embodiment>

Please refer to FIG. 15 , which is a schematic diagram illustrating an electronic device 1000 according to an eighth embodiment of the present invention. The electronic device 1000 of the eighth embodiment includes an imaging device 1100, and the imaging device 1100 includes an optical camera system group (not numbered) and an electronic photosensitive element 1110, wherein the electronic photosensitive element 1110 is disposed on the imaging surface 170 of the optical camera system group. The optical camera system group sequentially includes an object end reflection element, a plurality of lenses and an image end reflection element along the optical axis from the object side to the image side, wherein the optical camera system group of the imaging device 1100 can be the above-mentioned first to seventh embodiments Any of the optical imaging system groups described in the embodiments, and the optical imaging system group of the eighth embodiment is the same as the optical imaging system group of the above-mentioned first embodiment, and the detailed structure is described below with reference to FIG. 15 .

In the optical camera system group of the eighth embodiment, the object-end reflecting element and the image-end reflecting element are respectively a prism 180 and a prism 190, wherein there is no lens along the optical axis between the object-end reflecting element (prism 180) and the subject, and the image There is no lens along the optical axis between the end reflection element (prism 190 ) and the imaging surface 1150 . The plurality of lenses of the optical camera system group are the first lens 110, the second lens 120, the third lens 130, the fourth lens 140 and the fifth lens 150 in sequence from the object side to the image side, and also include an aperture 100 set between the prism 180 and the first lens 110 , and the filter element 160 is disposed between the fifth lens 150 and the prism 190 . In the eighth embodiment, the shapes, optical properties, and data of the components of the optical camera system group are the same as those described in the first embodiment, and will not be described here.

It can be seen from FIG. 15 that the maximum thickness of the electronic device 1000 of the eighth embodiment is Tmax, and Tmax=7.46mm, and the focal length of the optical camera system group of the eighth embodiment is f, and f=10.00mm. Therefore, the maximum thickness of the electronic device 1000 is smaller than the focal length of the optical camera system group (Tmax<f).

In addition, in the imaging device 1100 of the eighth embodiment, the optical image stabilization can be performed by moving the optical camera system group, for example, with an optical image stabilizer.

<Ninth Embodiment>

Please refer to FIG. 16 , which is a schematic diagram illustrating an electronic device 2000 according to a ninth embodiment of the present invention. The electronic device 2000 of the ninth embodiment is a smart phone. The electronic device 2000 includes an imaging device 2100. The imaging device 2100 includes an optical camera system group (not shown in the figure) and an electronic photosensitive element (not shown in the figure) according to the present invention, The electronic photosensitive element is arranged on the imaging surface of the optical camera system group.

<Tenth Embodiment>

Please refer to FIG. 17 , which is a schematic diagram illustrating an electronic device 3000 according to a tenth embodiment of the present invention. The electronic device 3000 of the tenth embodiment is a tablet computer. The electronic device 3000 includes an imaging device 3100. The imaging device 3000 includes an optical camera system group (not shown) and an electronic photosensitive element (not shown) according to the present invention, The electronic photosensitive element is arranged on the imaging surface of the optical camera system group.

<Eleventh Embodiment>

Please refer to FIG. 18 , which is a schematic diagram illustrating an electronic device 4000 according to an eleventh embodiment of the present invention. The electronic device 4000 of the eleventh embodiment is a wearable device. The electronic device 4000 includes an imaging device 4100, and the imaging device 4100 includes an optical camera system group (not shown) and an electronic photosensitive element ( The figure is not disclosed), wherein the electronic photosensitive element is arranged on the imaging surface of the optical camera system group.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be as defined in the appended claims.

Claims (21)

1. An optical camera system group, characterized in that, from the object side to the image side along the optical axis, it comprises: a first lens with positive refractive power; a second lens; a third lens whose object-side surface is convex; a fourth lens, at least one of the object-side surface and the image-side surface is aspherical; and a fifth lens, at least one of the object-side surface and the image-side surface is aspherical, and at least one of the object-side surface and the image-side surface includes at least one inflection point; Wherein, the total number of lenses in the optical camera system group is five, and any two adjacent lenses in the optical camera system group have an air gap on the optical axis, and the maximum angle of view in the optical camera system group is FOV, so The distance between the image-side surface of the lens that is closest to an imaging surface along the optical axis and the imaging surface on the optical axis is BL, and the lens object-side surface of the lens that is closest to an object along the optical axis and the imaging surface are BL. The distance on the optical axis of the image side surface of the lens that is closest to the imaging surface along the optical axis is TD, the distance between the second lens and the third lens on the optical axis is T23, and the first lens is on the optical axis. The thickness of the above is CT1, the focal length of the optical camera system group is f, and the focal length of the fourth lens is f4, which satisfies the following conditions: 0.10<tan(FOV)<0.85; 0.55<BL/TD<1.80; 0<T23/CT1<0.60; and -1.0<f/f4<1.0. 2 . The optical imaging system group according to claim 1 , wherein the focal length of the optical imaging system group is f, and the object-side surface of the lens that is closest to the object along the optical axis of the lens and the lens are 2 . The distance on the optical axis of the lens image-side surface closest to the imaging surface along the optical axis is TD, which satisfies the following conditions: 1.50<f/TD<2.50. 3. The optical camera system group according to claim 1, further comprising: An aperture, the distance on the optical axis from the aperture to the image-side surface of the lens that is closest to the imaging surface along the optical axis is SD, and the lens object-side surface of the lens that is closest to the subject along the optical axis The distance on the optical axis from the image-side surface of the lens that is closest to the imaging surface along the optical axis of the lens is TD, which satisfies the following conditions: 0.80<SD/TD<1.10. 4 . The optical camera system set according to claim 1 , wherein the object-side surface of the first lens is convex, the second lens has a negative refractive power, and the image-side surface of the fifth lens is concave. 5 . 5 . The optical camera system group of claim 1 , wherein the fourth lens has a negative refractive power. 6 . 6. The optical camera system group according to claim 1, wherein the focal length of the optical camera system group is f, and the focal length of the fifth lens is f5, which satisfies the following conditions: -1.0<f/f5<1.0. 7. The optical camera system group according to claim 1, wherein the focal length of the first lens is f1, and the focal length of the second lens is f2, which satisfy the following conditions: |f1/f2|<1.0. 8 . The optical imaging system group according to claim 1 , wherein the sum of the thicknesses of the lenses on the optical axis is ΣCT, and the sum of the distances between the two adjacent lenses on the optical axis is ΣAT, which satisfies 8 . The following conditions: 3.0<ΣCT/ΣAT<5.0. 9. The optical imaging system group according to claim 1, wherein the thickness of the first lens on the optical axis is CT1, and the sum of the thicknesses of the lenses on the optical axis is ΣCT, which satisfies the following conditions: 0.50<CT1/(ΣCT-CT1)<1.80. 10 . The optical camera system set according to claim 1 , wherein the dispersion coefficient of the second lens is V2, the dispersion coefficient of the third lens is V3, and the dispersion coefficient of the fourth lens is V4, which satisfies The following conditions: V2<27.0; V3<27.0; and V4<27.0. 11 . The optical camera system group according to claim 1 , wherein the lens surface of the lens closest to the object along the optical axis has an effective radius of Yo, and the lens closest to the imaging lens along the optical axis is Yo. 12 . The effective radius of the lens surface of the face is Yi, which satisfies the following conditions: 0.95<Yo/Yi<1.15. 12 . The optical camera system group according to claim 1 , wherein the maximum effective radius of the object-side surface and the image-side surface of the lens is Ymax, and the object-side surface and the image-side surface of the lens have a maximum effective radius of Ymax. 13 . The minimum effective radius in is Ymin, which satisfies the following conditions: 1.0<Ymax/Ymin<1.50. 13. The optical camera system group according to claim 1, further comprising: An aperture, wherein the distance from the object-side surface of the first lens to the aperture on the optical axis is Dr1s, and the distance from the image-side surface of the first lens to the aperture on the optical axis is Dr2s, which satisfies the following conditions: 0<|Dr1s/Dr2s|<1.0. 14. The optical camera system set according to claim 1, wherein the curvature radius of the object-side surface of the second lens is R3, and the curvature radius of the image-side surface of the second lens is R4, which satisfy the following conditions: -1.5<(R3-R4)/(R3+R4)<0. 15. The optical imaging system group according to claim 1, wherein the focal length of the optical imaging system group is f, and the maximum image height of the optical imaging system group is 1 mgH, which satisfies the following conditions: 3.0<f/ImgH<6.0. 16 . The optical camera system set of claim 1 , wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lens are all made of plastic, and the first lens is made of plastic. 17 . The object-side surfaces and the image-side surfaces of a lens, the second lens, the third lens, the fourth lens, and the fifth lens are all aspherical surfaces. 17. The optical camera system group according to claim 1, further comprising: At least one prism is arranged on the optical axis of the optical camera system group. 18 . The optical camera system group according to claim 17 , wherein the object-side surface of the lens that is closest to the object along the optical axis in the lens and the lens that is closest to the imaging surface along the optical axis of the lens. 19 . The distance between the image-side surface of the lens and the optical axis is TD, and the sum of the lengths of at least one internal optical axis path of the prism is TP, which satisfies the following conditions: 0.80<TD/TP<1.25. 19 . The optical camera system group of claim 17 , wherein the prism is disposed between the object and the first lens along the optical axis or between the fifth lens and the imaging surface along the optical axis. 20 . 20. An imaging device, characterized in that, comprising: The optical camera system group of claim 1; and An electronic photosensitive element is arranged on the imaging surface of the optical camera system group. 21. An electronic device, characterized in that, comprising: The imaging device according to claim 20.

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